I can't believe anyone shipping a datastore could let it happen after that. Doesn't postgresql still limit the default listen_address to local connections only? Seems like the best approach. On a distribute store consistency operations between nodes should go on a different channel than queries and should be allowed on a node by node basis at worst. At least at that point, it requires someone who should know better to make it open to the world. Even just listening for local connections passwordless auth should never be a default.